Variocoupler for radio telegraphy and telephony



Oct. 27 1925. 1,558,473

H. H. GOYRDON .VARIOGOUPLER FOR RADIO TELEGRAPHY AND TELEPHONY 'Filed Oct. 22, 1923 2 Sheets-Sheet 1 Ill/M Oct. 27, 1925.

H.` H. GORDON VARIOCOUPLER FOR RADIO TELEGRAPHY AND TELEPHONY Filed Oct. 22. 1:923 2 SheBiS-Shaei 2 duct nu a To all 'whom it may concem:

menu ou. 27.1925.

IUNITED STATES Pa'reN'rfv OFFICE.

VABIOCOUPLEB FOB. RADIO TELEGRAPHY. A ND TELEPHONY.

Application led October 22, 1923. Serial No. 670,212.

Be it known that I, HAYNER H. GORDON,

4a citizen of the United States residing at Washington in the District of Columbia, have invented new -and useful Improvements in Variocouplers for Radio Telegraphy and Telephony, of which the following is a speciicatiom It is an object of the present invention to provide a vario-coupler in which magnetic inter-action between the windings may be controlled without movement of the windings relative to each other.

It is a further object of the present 1nvention to provide a vario-coupler construction in which a shield of non-magnetic Inaterial is' located between the windings, which shield is movable to vary and to control the extent of interaction between the windings.

It is a still further object of the present invention Vfto provide a vario-coupler having fixedtightly coupled windings, the in teraction of the windings being regulatable by means of a copper shield.

Reference is now had to the acco1npanying drawings which illustrate several feasibleembodiments of my invention.

Fig. 1 is a diametrical cross section of one embodiment of the present invention.

Fig. 2 is aplan view of the saine with the top plate an winding removed.

`Fig. 3 is a combined sectional and diagrammatic view ofthe standard three circuit receiver.

Fig. 4 is a diametrical cross section of another modification.

Fig. 5 is a plan view of the modification shown in Fig. 4with the top plate and winding removed.

Fig. 6 is an enlarged dissected view showing the mounting of the shielding plates on the shaft.

The specific embodiment shown in Figs. 1 and 2 of the drawings comprises upper and lower end plates 1 and 2, composed of bakelite or other similar insulatin malterial. These plates are spaced paral el to each other by a plurality of spacing washers 3, 3, mounted upon a plurality of screws 4 which serve to bolt the plates 1 and 2 together.

. surface of Secured to or mounted upon the lower late 1. is a fiat inductive winding 5. vThis winding as shown is of the spider web type although any fiat winding-either of single or multiple layers may be used. Mounted upon the upper surface -of the lower plate 2 is a second coil simi- 'in the electrical relationship to each other technically known as tightly coupled.

A semiscircular shield plate of copper or similar nonor diama-gnetic material 7 is fixedly mounted upon the supporting screws or posts li, this plate being spaced parallel toand located intermediate the windings 5' and 6 by means of the suitable disposition of the spacing washers 3.

A shaft 8 is mounted in bearings 9 and 10 in the upper and lower plates 1 and 2, so that the axis of the shaft is perpendicular to the plane of the plates and the windings carried by them. Fixed to the shaft and located between'the shield plate 7 and the lower coil 6 is a second semicircular shield plate 11 made of the same material as plate 7. The position of this plate is located by means of spacing washers or collars 12 and 13.

An insulating knob 13a of conventional form is used to rotate the shaft 8 and thereby to cause the plate 11 to rotate more or interaction or coupling exists between one half of each coil. The coupling effect between the windings 5 and 46 may there-I fore be varied to a considerable extent Without moving the windings relatively to each other in the simple and compact structure just described'. The windings 5 and 6 are respectively connected to any two circuits the coupling between which it is desired to control. lf desired, however, windings 5 and 6 may be connected in series and the device thereupon becomes a variometer capable of regulating the self inductance of a circuit.

In Fig. 3 is shown a further modification of the present invention in which three coils 14, 15 and 16 are mounted between and parallel to end plates 1 and 2. shielded from` coil 15 by the stationary Coil 14 is i shield plate 17 and movable shield plate 18 l windin y cuit, wlnding 'is connected in the grid in which it is desired u efl'ect' between the windings to a minimum.

- caused to rotate with the same.

and e011 15 is shielded from coil 16 by stationary shieldplate 19 and movable shield plate 20. The shield plate 20 is controlled means of shaft 21 and knob 22, and mova le shield plate'. 18 is lcarried on a bushing 20 and is controlled b the knob 24.

In the embodiment isclosed in this figure,

16 is connected in the antenna circircuit, and windin 14 is connected in the plate circuit. k.Kno 24 together with the movable shield plate 20 therefore controls the coupling between the antenna and the gridvcircuit's, and knob 22,.operating plate 18 controls the efl'ect of the plate circuit upon th'e grid circuit through coils 14 and 15 and there-forecontrols and re lates the re nerative effect in the circuit isclosed.

. he modification shown in Figs. 4, 5 and 6 relates to a form of the uce the shielding The structure comprises parallel end lates land 2 carrying windings 5 and 6 1n the manner previously described. A controlling shaft 10-is mounted concentric and per-` pendicular to the plane of windin s 5 and 6- the shaft being controlled by a nob 13. donstructed integrally with the shaft 10 is a cylindrical collar 25 havin a uared dependent portion 26. Four s ielding plates 27, 28, 29 and 30 of nonor diamagnetic material are shown. These plates are each adapted to cover van arc of approximatel 100,s'o as to ermit of overlap, and eac plate is proviclbd with a circu ar openin to fit over the uared shank portion 26 o the collar 25 an to be free to rotate relative thereto. Located between each plate are friction washers 27, 28", ,29 and 30 provided with square openin which lit upon the squared shank 26 an thereby are The assemblage of plates and washers upon the 1 shank 26 is held in tight yielding engagement by means of a spring washer/31 whlch presses the assembly against the collar 25.

he collar 25 rovides a suitable spacing means between t e u per shield plate 27 vand the upper plate 1 w en the device is assembled. As shown in Fig. 5 the shield plates 27,28, 29 and`30 are provided with outwardly extending projections, 32, 33, 34 and 35 respectively. These project-ions which vary in length engage respectively with the mounting columns 32, 33, 34 and 35", ,respectively, which are not concentric with s aft `1O but whichare spirally arran ed with respect to the axis of this shaft, an at successively diminished distances therefrom.

Plate 27 is fixed to mountingpillar 35 and is therefore stationary.

When the shaft 10-1s rotated by the knob, 14 it tends to rotate plates 28, 29 and 30 resent `invention with it by virtue of their frictional engagement with washers 27, 28'?, 29* and 30. When the projection 33 of plate 28 comes in contact with pillar 33, it is constrained from further rotation. Plates 29 and 30 cont-inue to rotate however until projection 344 contacts with supporting pillar 34, when further rotation of plate 29 is prevented. Plate 30 however continues to rotate until 35 contacts with supporting pillar 35", whenl the shielding action of the plates is complete. Upon' reverse rotation of shaft 10' the lates rotate into position behind plate 27, t eir rear edges contacting with pillar ,35 in such manner as to prevent further backward rotation of plates, and approximately 270 or three-fourths of the windings are exposed to each other.

tris of course obvious 'that any number of shielding plates may be utilized in this modification.

Still further modification of the resent invention may be contemplated wit in the sco e of the appended clalms.

hat I claim is:

1. In combination, two or more circuits each of which includes inductance, said inductances being arranged for maximum coupling effect each with the other, diamagnetic members interposed between adjacent inductances partially reducing the 'interaction therebetween and diamagnetic members movably interposed between adjacent inductances to further modify the degree of interaction between adjacent inductances.

. 2. In, combination, two or more circuits each of which includes an inductance, said inductances being arranged for maximum coupling effect each with the other, diamagnetic members interposed between adjacent 105 inductances partially reducing the interaction therebetween, said members being relatively offset, and diamagneticshields movably interposed between adjacent inductances to further modify the degree of inter- 11o action between adjacent inductances,

3. In combination, threecircuits, an inductance including in each circuit, said in- .Y ductances being arranged for maximum coupling effect between the adjacent nduct- 115 ances, diamagnetic members inter osed between adjacent inductances partia y reducing the 1nteraction therebetween and diamagnetic members movably interposed between adjacent inductances to 'further 120 modify the degree .of interaction between v adjacent inductances.

j 4. In a vario-coupler, the combination of a fixed winding, a second fixed winding mounted adjacent said first winding and a 125 diamagnetic shield located between said windings'comprising a fixed' element and an adjustable element.

5. In a vario-coupler, the combination of 4 a fixed at winding, a second xed flat wind- 180 ALuana f. said first winding, a diamagnetie (plate member ix'edly located adjacent sai windings with its plane parallel to the plane of the windings and adapted to alter the natural inductance of the windings by virtue of its relationship thereto and a second diamagnetic plate member mounted adjacent said coils with its plane parallel to the plane of'l the coils and means for moving said second plate member with respect to said first mentioned plate member.

In testimony whereof, I have hereunto affixed niy signature.

g v HAYNER H. GORDON. 

